Apparatus for making cylinder glass.



PATENTED AUG. 2, 1904.

J. HALE-Y.

APPARATUS FOR MAKING CYLINDER GLASS.

APPLICATION FILED DEU.12,1903.

2 SHEETS-SHEET 1.

N0 MODEL.

I N1. 1 E H)// I A m TM f PATENTED AUG. 2, 1904.

No. 766,183-v J. HALBY.

APPARATUS FOR MAKING CYLINDER GLASS.

APPLICATION FILED DEG.12, 1903.

2 SHEETS-SHEET 2.

N0 MODEL,

WITNESSES. INVENTOI? M a Z% BY ATTORNEYS UNITED STATES Patented August 2, 1904.

PATENT OEEIcE.

JONATHAN HALEY, OF AKRON, OHIO, ASSIGNOR TO THE AKRON GLASS AND MACHINERY COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

APPARATUS FOR MAKING CYLINDER GLASS.

SPECIFICATION forming part of Letters Patent No. 766,183, dated August 2, 1904.

Application filed December 12, 1903- Serial No. 184,886. (No model.)

To all whom it may concern:

Be it known that I, JONATHAN HALEY, a citizen of the United States of America, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Apparatus for Making Cylinder Glass; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to improvements in apparatus for making cylinder glass to be used for window-glass.

The primary object of this invention is to provide apparatus of the character indicated which is simple in. construction and convenient and reliablein its operation and whereby cylinder glass can be made or formed with great facility.

Another object of this invention is to provide a turn-table carrying two pots or vessels which are arranged at diametrically opposite sides, respectively, of and equidistantly from the axis of the table and movable by the actuation of the table from in under the discharge aperture or outlet of a glass-metalsupply tank or chamber to and in under the path of a glass-drawing tool, with such a relative arrangement of the parts that when glass is being drawn from one of the said vessels the other of the said vessels is in position to receive the discharge from the aforesaid outlet.

Another object is not only to receive glassmetal from the discharge aperture or outlet of a glass-metal-supply tank or chamber into a movable pot or vessel and to move the said vessel from its glass-metal receiving position 4 into position in under and in line vertically with the path of the glass-drawing tool, but to maintain the said vessel and its contents in a suitably-heated condition preparatory to and during the glass-drawing operation.

IVith these objects in view and to the end of realizing other advantages hereinafter appearing this invention consists in certain features of construction and combinations of parts hereinafter described, and pointed out in the claims.

In the accompanyingdrawings, Figure 1 is a side elevation, largely in section, of apparatus embodying my invention, and portions are broken away in this figure to reduce the size of the drawings. Fig. 2 is a top plan in section on line 2 2, Fig. 1, illustrating a portion of the apparatus and drawn on a larger scale than Fig. 1. Fig. 3 is a side elevation, largely in section, of the swinging stopper for closing the discharge aperture or outlet of the glass-metal-supply chamber and means employed in circulating a cooling agent through the interior chamber of the said stopper. Fig.

3 is drawn on a larger scale than 1 and 2.

Referring to the drawings, A designates the 5 tank of a melting-furnace, which tank has an interior chamber (1., in which molten glass or glass-metal is produced. The chamber a is shown containing a body of glass-metal G, which is kept in a suitably-molten condition 7 in any approved manner. Means for producing a body of molten glass or glass-metal and maintaining it in a suitably-molten condition are too well known to require description or illustration in this application.

The chamber a is the glass-metal-supply chamber of my improved apparatus, and is provided at the bottom with an outlet arranged to discharge downwardly and formed by an aperture 1; in the tank A. A stopper B 0 for closing the outlet 6 is provided. The stopper B is pivotally supported from the tank A and arranged to swing in a vertical plane, having an arm 5, which is horizontally pivoted, as at 6, to a lug or bracket 7, with which the 8 5 tank A is externally provided a suitable distance above the aperture or outlet 7).

The stopper B is hollow or chambered in-f teriorly, as at 8, and means for circulating a cooling agent through the interior chamber 9 8 of the stopper is provided and comprises, preferably, two parallel passage-\mys 10 and 12, which are formed in the arm 5, which passage-ways are shown very clearly in Fig. 3 and communicate with. the chamber 8. The

passage-way 1O communicates with the discharging end of a hose or flexible tube 6, which communicates at its opposite end with the discharging end of a water-supply pipe E, which is provided with a valve E. The passageway 12 communicates with the receiving end of a hose or flexible tube f, which communicates at its opposite and discharging end with a basin F, provided with a drain-pipe F, which leads to any desired place. Upon opening the valve E water passes from the pipe E through the tube a, passage-way 10, chamber 8, and thence through the passage-way 12, tube f, and basin F, and a circulation of the water or cooling agent through the said chamher 8 is established and the stopper B thereby kept in a cool condition. The arm 5 operates as a weight acting to retain the stopper in its closed position. In dotted lines, Fig. 1, the stopper B is shown closed. In 'solid lines, Fig. 3, the stopper is shown in its closed and operative position. In solid lines, Fig. 1, the stopper is shown swung open and held in its open and inoperative position bya suitably-applied pawl P and ratchet-wheel P. The pawl P is pivotally supported from the bracket 7 and engages the ratchet-wheel P, which is formed upon or operatively connected with the arm 5 of the stopper and arranged with its axis coincident with the axis of the said arm.

At a suitable elevation below the outlet 6 of the glass-metal-supply chamber is arranged a horizontal turn-table J, which is supported in any approved manner and in Fig. :1 is shown mounted upon a stationary table I and having bearing upon balls K, extending from within an annular recess J, formed in the under side of the turn-table into an annular recess I, formed in the upper side of the stationary table, and the said recesses are arranged concentrically of the axis of the turntable.

Two pots or vessels D are mounted upon the turn-table J at diametrically opposite sides, respectively, of and equidistantly from the axis of the said table. The interior chamber 13 of each vessel D is open at the top of the vessel. Thev upper portion of the chamber 13 of each vessel D is circular. The lower portion of the chamber 13 of each vessel D is annular, and the opposing side Walls of the said lower and annular portion of the said chamber slope toward each other downwardly gr in the direction of the bottom of the cham- Each vessel D to prevent displacement of the said vessel laterally upon the turn-table is provided in its under side with a cavity (Z,

engaged by a lug or projecting member 14,

formed upon or rigid with the said table.

The arrangement of the turn-table J and the pots or vessels D, mounted thereon, relative to the outlet 6 of the chamber a is such that the said vessels are by the actuation of the said table movable alternately in under the form of a cylinder is provided and comprises. preferably. stationary framework H, arranged, as shown in Fig. 1, adjacent to the turn-table and having wheels H, engaging the rails h of a track along which the said framework is movable.

The framework H is provided with a vertically-arranged cylindrical guide 17, which loosely embraces and affords lateral bearing to the corresponding]y-arranged cylindrical and tubular shank or stem L of a holder L,

arranged below the said guide and employed in supporting the vertically-arranged ring or annular tool R,employed in drawing glassmetal from within a vessel D upwardly into the form of a cylinder C, as shown in Fig. 1. Theglass-drawing tool R is attached to the holder L in any approved manner.

The holder L is suspended from a cable Z, which is attached at one end to the said holder. The cable Z leads upwardly from the holder L externally of and along the stem L to and over a guide-sheave Z, supported from the framework H adjacent to the guide 17, and thence leads downwardly into operative engagement with a winding-drum P, which is operatively mounted on a horizontally-arranged shaft 25, supported from the framework H. A spur gear 26 is operatively mounted on the'shaft 25 and meshes with a pinion 28, operatively mounted on a shaft 30, which is arranged horizontally and parallel with the shaft 25 and supported from the framework H. The shaft 30 is operatively provided with a spur-gear 32, which meshes with a pinion 33, operatively mounted on the driving-shaft 34, which is operatively provided with a driving-wheel 37 to which power is applied in any approved manner. The winding-drum Z is rotated in the one direction or the other, according as the glass-drawing tool R is to be lowered or hoisted.

The drum bearing-shaft 25 is operatively provided with a ratchet-wheel 35, and a pawl 36, which is pivotally supported from the framework H, engages the said wheel. The ratchet-wheel 35 and pawl 36 are arranged, as required, to prevent the rotation of a drum Z in the direction required to pay out the cable Z. The drum Z is rendered free to pay out the said cable upon disengaging the pawl 36 from the wheel 35.

A vertically-movable pipe u is arranged centrally and longitudinally of the stem L of the holder L. The pipe 10 extends a suitable distance below the stem L, and a hose or flexible tube a: is attached atone end to the upper end of and communicates with the pipe 14,

and at the opposite end communicates with the outlet of an air-supplying device-such, for instance, as a pump or blower 38, operated in any approved manner. The pipe a is provided within the stem L with a slide forming-collar at, which has lateral bearing in the said stem. The tube a: leads over a guide-sheave 11*, supported from the upper end of the stem L. The air-supplying device 38 is supported from the framework H and communicates at its inlet with the external atmosphere. Obviously the operation of the air-supplying device results in the passage of air through the connected hose or tube :1. into the pipe a and thence into and through the nozzle with which the said pipe at its lower end is provided. The nozzle 3 is provided with laterally-discharging orifices 10, some of which are located at suitable intervals circumferentially of the lower and transversely larger end of the nozzle ;1 which is cylindrical at the said end. The lower end of the nozzle ;1 is somewhat smaller diametrically than but arranged centrally of the cylinder of glass to be drawn upwardly around the said nozzle.

A cable 162, employed in hoisting and lowering the pipe u and connected nozzle 1 is provided and operatively attached at one end to the said pipe. The cable 162 leads from the pipe 1/ upwardly to and over a vertically-arranged guide-sheave 7L3, supported from the framework H at the upper end of the framework, and thence downwardly into operative engagement with a winding-drum or cablewinding device M5, which is supported from the said framework. A ratchet-wheel L5 is operatively connected with the drum a and arranged with its axis coincident with the axis of the said drum. A pawl 46, which is pivotally supported from the framework H, engages the ratchet-wheel 45. The ratchetwheel 45 and pawl 46 are arranged to prevent rotation of the drum u in the direction re: quired to pay out the cable if. The drum n" is free to turn in the direction required to wind up the cable 14 and is rendered free to pay out the said cable upon discharging the pawl -16 from the ratchet-wheel L5. The pipe at and connected nozzle 1 lower by gravity when the drum I is free to pay out the cable 1/? and are hoisted by winding up the said cable. It will be observed that by the construction and arrangement of the parts hereinbefore described the glass-drawing tool R and the nozzle 1 are readily brought into the proper position relative to the glass-metal to be drawn from a vessel 1).

The arrangement of the turn-table J and the pots or vessels D upon the said table relative to the path of the glass-drawing tool R is such that the said vessels are by the actuation of the said table movable alternately in under and into line vertically with the said path. The arrangement of the parts is such,

therefore, as already indicated, that when one of the vessels D is in position to receive the discharge from the outlet 1) of the glass-metalsupply chamber a the other of the said vessels is in position in under and in line vertically with the path of the glass-drawing tool R, and the lower and annular portion of the interior chamber 13 of each vessel D, when the said vessel is in position in under the path of the glass-drawing tool R, is in line with the said path, and the dimensions transversely of: the glass-drawing tool are such relative to the transverse dimensions of the vessels D that glass is drawn by the said tool from a vessel D centrally between the side walls of the lower and annular portion of the said vessel when the latter is in position in under and in line vertically with the path of the said tool. In Fig. 1 cylinder glass C is shown being drawn from a vessel D.

In the operation of my improved apparatus hereinbefore described the turn-table J is actuated, if the vessels 1) are not already in their proper position relative to the outlet 7) of the glass-metal-supply chamber and the glass-drawing tool, to the'extent required to bring one of the said vessels in under and in position to receive the discharge from the said outlet and to bring the other of the said vessels into line vertically with the path of the glass-drawing tool. The glass-drawingtool is then lowered into the vessel D into contact with the glass-metal within the said vessel, and the pipe a is lowered to bring the nozzle ;1 into its lower positionviz., next above and centrally of the said vessel, as shown in Fig. 1-whereupon the glass-metal within the chamber of the said vessel is drawn upwardly by hoisting the glass-drawing tool, as shown in Fig. 1. The pipe 11 and connected nozzle ;1 remain in their lower position until all the glass has been drawn from within the said vessel upwardly above the said vessel and around and above the nozzle ;1 \Vhile the glass cylinder C is being drawn from the said vessel, the air-supplying device 38 is operated to supply air to the nozzle 1/ for use in cooling the said cylinder, but not under pressure sufiicient to injure the glass. The hose or flexible tube r is long enough to accommodate the movement of the glass-drawing tool into its upper position, and slack in the said tube is taken up during the ascent of the said tool without resulting in the lifting of the nozzle ;1 but as the said nozzle is not held down by any device attached directly to the nozzle means for positively preventing upward displacement of the pipe a and connected nozzle during the glass-drawing operation is provided and comprises, preferably, an endwise-shiftable bar or member M, which has bearing in the guide 17 and in its inner and operative position closely overlaps the upper end of the collar '01 of the pipe w when the said pipe is in its lower ment of the said pipe. The stop-forming bar or member M is operatively connected at its outer end with a lever m, which is fulcrumed horizontally, as at m, to and externally of the guide 17 and is provided at its lower and free end with an incline m arranged to be engaged by a member L formed upon and exteriorly of the holder L, and the arrangement of the parts is such that the said member L during the actuation of the glass-drawing tool into its upper position comes into engagement just before the said tool reaches its upper position with the incline m and thereupon actuates the said lever outwardly, as shown in dotted lines, Fig. 1, as required, to disengage the bar M from the pipe and thereby render the said bar inoperative. The stem L is slotted longitudinally, as at 18, to accommodate the location of the stop M during the endwise movement of the said stem.

By the apparatus hereinbefore described the glass drawn upwardly from within a vessel D leaves the said vessel centrally between the downwardly-converging side walls of the lower and annular portion of the chamber of the vessel, and the glass does not drag over any surface in being drawn from the said vessel, and all the glass-metal in the said vessel is drawn from the latter. During the glassdrawing operation air is discharged into the cylinder of glass being drawn in close proximity to the surrounding wall of the interior chamber of the said cylinder and at or in close proximity to the end of the interior chamber of the vessel from which the said glass is being drawn, so that the glass drawn in the formation of the said cylinder is cooled and solidified as or about as it leaves the chamber of the said vessel.

Although I do not wish it to be understood that a heater externally of the glass-metal-supply chamber is essential to maintain the glassmetal discharged from the said chamber into a vessel D in the desired molten condition, a heater operating to maintain the glass-metal in the pots or vessels D upon the turn-table J in a suitably-molten condition is provided and comprises, preferably, a heating-jacket Q, which extends transversely of the said table and around the said vessels. The table J participates in the formation of the jacket Q. The jacket Q is provided at the bottom with air-inlets Q and at the top with air-outlets Q Each vessel D at its lower end is surrounded by a heating-burner t, contained within the chamber of the jacket Q, and the two burners t communicate with the pipe T for supplying gas or liquid or vaporous fuel to the said burners, which pipe has its discharging end arranged coincidently with the axis of the turn-table J and extends downwardly from the said turn-table and downwardly through the stationary table I and is provided at any convenient place with a valve T for controlling the supply of fuel to the burners. The

connection of the burners z, with the pipe T preferably comprises a pipe-coupling t, which is turnably mounted upon the said pipe T and arranged coincidently with the axis of the turntable,which is provided with a centrallylocated hole J accommodating the location of the pipe connection 2," and the pipe T. It will be observed, therefore, that the heater comprising the burners 2? moves with the turn-table in conveying a vessel D from in under the outlet Z) of the chamber a to and in under the path of the glass-drawing tool, and vice versa. It will be observed also that when one of the vessels D is being conveyed from in under the outlet 5 to and in under'the path of the glass-drawing tool the other of the said vessels moves from in under the said path to and in under the said outlet.

The stopper B is of course actuated into its open and inoperative position preparatory to a running of molten glass or glass-metal from the chamber a into a vessel D and is held in its said position by the cooperating ratchetwheel P and pawl P. Suppose that the operation of drawing glass from within one of the vessels D required more time than the supplying of glass-metal to the other of the said vessels. Obviously, then, the outlet 6 of the glass-metal-supply chamber would not be opened until the glass-drawing operation was far enough along to enable the completion of the drawing of glass from one of the said vessels simultaneously or approximately simultaneously with the charging of the other of the said vessels.

What I claim is 1. The combination,with a glass-metal-supply chamber provided with an outlet; means for closing the said outlet; a movable glassdrawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a pot or vessel open at the top and having a range of to and in under and into line with the path of the glass-drawing tool, and vice versa.

2. The combination, with a glass-metal-supply chamber provided with an outlet; means for closing the said outlet; a vertically-movable and verticallyarranged annular glassdrawing tool externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a pot or vessel having a range of movement laterally from in under the aforesaid outlet to and in under the path of the glass-drawing tool, which vessel has an interior chamber whose lower portion is annular,with the opposing side walls of the said portion of the said chamber sloping downwardly toward each other, and means for conveying the said vessel from in under the aforesaid outlet to and in under the glass-drawing tool, and vice versa, and the arrangement of the parts being such that the vessel,when the latter has been actuated into position in under the glass-drawing tool, shall have its aforesaid annular portion in line with the said tool.

3. The combination, with a glass-metal-supply chamber provided with a downwardly-discharging outlet; means for closing the said outlet; a vertically-movable and verticallyarranged annular glass-drawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a pot or vessel having a range of movement laterally from in under the aforesaid outlet to and in under the path of the glass-drawing tool, which vessel has an interior chamber whose upper portion is circular and open at the top and whose lower portion is annular, with the opposing side walls of the said lower and annular portion sloping downwardly toward each other, and means for conveying the said vessel from in under the aforesaid outlet to and in under and into line with the path of the glass-drawing tool.

4. The combination,with a glass-metal-supply chamber provided With an outlet; means for closing the said outlet; a movable glassdrawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a pot or vessel having a range of movement laterally from in under the aforesaid outlet to and in under the path of the glass-drawing tool; means for conveying the said vessel from in under the said outlet to and in under and into line with the path of the glass-drawing tool, and vice versa, and a heater for the said vessel, which heater is movable with the vessel.

5. The combination,with a glass-metal-supply chamber provided with an outlet; means for closing the said outlet; a movable glassdrawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a turntable extending from in under the aforesaid outlet to and in under the path of the glassdrawing tool; a support for the table, and a pot or vessel mounted on the table, and the arrangement of the parts being such that the said vessel is movable into position to receive the discharge from the aforesaid outlet or into line with the path of the glass-drawing tool by the actuation of the table.

6. The combination,with a glass-metal-supply chamber provided with an outlet; means for closing the said outlet; a vertically-movable glass-drawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a turn-table extending from in under the aforesaid outlet to and in under the path of the glass-drawing tool; a support for the said table, and a pot or vessel mounted on the table, which vessel has an interior chamber circular and open at the top and annular at the bottom, with the opposing side walls of the lower and annular portion of the said chamber sloping downwardly toward each other, and the arrangement of the parts being such that the said vessel is movable into position to receive the discharge from the aforesaid outlet or into position with the annular portion of its chamber in line with the path of the glass-drawing tool by the actuation of the table.

7. The combination,with a glass-metal-supply chamber provided with an outlet; means for closing the said outlet; a movable glassdrawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a turntable extending in under the aforesaid outlet to and in under the path of the glass-drawing tool; a support for the table; a pot or vessel mounted on the table and movable, by the ac- S tuation of the table, from in under the said outlet to and in under the aforesaid path, and vice versa; a burner arranged to heat the said vessel and carried by the table, and means for feeding fuel to the said burner.

8. The combination, with a glass-metal-supply chamber provided with an outlet; means for closing the said outlet; a movable glassdrawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a turntable extending from in under the aforesaid outlet to and in under the path of the glassdrawing tool; a support for the table; a pot or vessel mounted on the table and movable, by the actuation of the table, from in under the said outlet to and in under the aforesaid path and vice versa; a heater comprising a heating-burner surrounding the lower end of the said vessel and borne by the table, and a valved pipe arranged at its discharging end coincidently with the axis of the table and communicating with the burner.

9. The combination, with a glass-metal-supply chamber provided with an outlet; means for closing the said outlet; a movable glassdrawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of a turntable extending from in under the aforesaid outlet to and in under the path of the glassdrawing tool; a support for the table; a pot or vessel mounted on the table and movable, by the actuation of the table, from in under the said outlet to and in under the aforesaid path and vice versa; a heating-burner borne by the table and arranged to heat the said vessel; a valved pipe for feeding fuel to the burner, and a pipe connection arranged coincidently with the axis of and turnable with the table and communicating, at one end, with the burner and, at its opposite end, with the aforesaid pipe.

10. The combination, with a glass-metal supply chamber provided with an outlet;

. gaged by the aforesaid projecting member of the table, and the arrangement of the parts being such that the said vessel is movable, by the actuation of the table, into position to receive the discharge from the aforesaid outlet or into line with the path of the glass-drawing tool.

11. The combination, with a glass-metalsupply chamber provided with an outlet; means for closing the said outlet; a movable glass-drawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of two pots or vessels open at the top and arranged a suitable distance apart laterally and movable laterally simultaneously, and means for moving the said vessels simultaneously, and the arrangement of the parts being such that when one of the said vessels is in position to receive the discharge from the aforesaid outlet the other of the said vessels is in position in under and in line with the path of the glassdrawing tool.

' 12. The combination, with a glass-metalsupply chamber provided with an outlet; means for closing the said outlet; a movable glass-drawing tool arranged externally of and a suitable distance from the said chamber, and means for actuating the said tool, of two pots or vessels arranged a suitable distance apart laterally and movable laterally simultaneously; means for moving the said vessels simultaneously, and a heating-jacket surrounding both vessels and movable with the vessels, and

the arrangement of the parts being such that means for actuating the said tool, of a turntable extending from in under the aforesaid outlet to and in under the path of the glassdrawing tool; a support for the turn-table, and two pots or vessels mounted on the said table at diametrically opposite sides respectively of and equidistantly from the axis of the table, and the arrangement of the parts being such that each vessel is movable, by the actuation of the table, into position to receive the discharge from the aforesaid outlet, and that when one of the said vessels is in position to receive the said discharge the other vessel is in position in under and in line with the path of the glassdrawing tool.

14. The combination, with a glass-metal-- supply chamber provided with an outlet; a movable glass-drawing tool arranged externally of and a suitable distance from the said chamber; means for actuating the said tool; a pot or vessel open at the top and having a range of movement laterally from in under the aforesaid outlet to and in under the path of the glass-drawing tool, and means for conveying the said vessel from in under the said outlet to and in under and into line with the said path, and vice versa, of a stopper for closing the said outlet, which stopper is holper for closing the said outlet, which stopper is hollow or interiorly chambered, and means for circulating a cooling agent through the chamber in the stopper.

16. The combination, with a glass-metalsupply chamber provided with an outlet; a movable glass-drawing tool arranged externally of and a suitable distance from the said chamber; means for actuating the said tool, and a pot or vessel open at the top and having a range of movement laterally from in under the aforesaid outlet to and in under the path of the glass-drawing tool, of a stopper for closing the aforesaid aperture, which stopper is hollow or interiorly chambered and pivotally supported and arranged to swing in a vertical plane; means for holding the stopper in its open and inoperative position, and means for establishing the circulation of a cooling agent through the chamber in the stopper.

17. The combination, with a glass-metalsupply chamber provided with an outlet; a

movable glass-drawing tool arranged externally of and a suitable distance from the said chamber; means for actuating the said tool; a pot or vessel having a range of movement laterally from in under the aforesaid outlet to and in under the path of the glass-drawing tool, of a swinging stopper for. closing the said outlet; means acting to retain the stopper Ioo in its closed and operative position, and means for holding the stopper in its open and inoperative position.

18. The combination, with a pot or vessel from which glass-metal is to be drawn in the form of a cylinder; a vertically-movable annular tool for drawing glass from the said vessel; means for operating the said tool, and a vertically-arranged and vertically-movable pipe arranged centrally of the path of the glass-drawing tool and provided with a nozzle at its lower end, of a stop for positively preventing upward displacement of the said pipe when the pipe is in its lower position, and means whereby the said stop is rendered inoperative by the actuation of the glass-drawing tool into its upper position.

19. The combination, with a pot or vessel from which glass-metal is to be drawn in the form of a cylinder; a vertically-movable annular tool for drawing glass from the said vessel; means for operating the said tool, and a vertically-arranged and vertically-movable pipe arranged centrally of the path of the glass-drawing tool and provided with a nozzle at its lower end, of a stop-forming shiftable member for preventing .upward displacement of the said pipe when the pipe is in its lower position, a lever operatively connected with the said stop-forming member, and means whereby the said lever is operated to render the stop-forming member inoperative by the actuation of the glass-drawing tool into its upper position.

20. The combination, with a pot or vessel from which glass-111etal is to be drawn in the form of a cylinder; a vertically-movable annular tool for drawing glass from the said vessel, which tool has an upwardly-projecting vertically arranged tubular stem; a correspondingly-arranged guide for the said stem; means for operating the said tool, and a vertically-arranged and vertically-movable pipe arranged centrally of the path of the glassdrawing tool and provided externally with a member having an upwardly-facing surface, of means for preventing upward displacement of the said pipe when the pipe is in its lower position; an endwise-shiftable bar extending into the aforesaid stem and arranged to overlap the aforesaid surface in the lower position of the pipe, and means whereby the said bar is rendered inoperative by the actuation of the glass-drawing tool into its upper position, and the aforesaid stem being slotted to accommodate the location of the said bar duringthe operation of the glass-drawing tool.

in testimony whereof I sign the foregoing specification in the presence of two witnesses.

JONATHAN HALEY.

Witnesses:

G. H. DORER, G. M. HAYES. 

